* [PATCH v2] elf: _dl_find_object may return 1 during early startup (bug 30515)
@ 2023-07-04 12:46 Florian Weimer
0 siblings, 0 replies; 4+ messages in thread
From: Florian Weimer @ 2023-07-04 12:46 UTC (permalink / raw)
To: libc-alpha
Success is reported with a 0 return value, and failure is -1.
Enhance the kitchen sink test elf/tst-audit28 to cover
_dl_find_object as well.
Fixes commit 5d28a8962dcb ("elf: Add _dl_find_object function")
and bug 30515.
---
v2: Support --enable-hardcoded-path-in-tests.
elf/dl-find_object.c | 2 +-
elf/tst-auditmod28.c | 11 +++++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/elf/dl-find_object.c b/elf/dl-find_object.c
index 928eb499cc..c1390ee10f 100644
--- a/elf/dl-find_object.c
+++ b/elf/dl-find_object.c
@@ -46,7 +46,7 @@ _dl_find_object_slow (void *pc, struct dl_find_object *result)
struct dl_find_object_internal internal;
_dl_find_object_from_map (l, &internal);
_dl_find_object_to_external (&internal, result);
- return 1;
+ return 0;
}
/* Object not found. */
diff --git a/elf/tst-auditmod28.c b/elf/tst-auditmod28.c
index f6ab991398..f6dfbbe202 100644
--- a/elf/tst-auditmod28.c
+++ b/elf/tst-auditmod28.c
@@ -71,6 +71,17 @@ la_version (unsigned int current)
TEST_VERIFY (dladdr1 (&_exit, &info, &extra_info, RTLD_DL_LINKMAP) != 0);
TEST_VERIFY (extra_info == handle);
+ /* Check _dl_find_object. */
+ struct dl_find_object dlfo;
+ TEST_COMPARE (_dl_find_object (__builtin_return_address (0), &dlfo), 0);
+ /* "ld.so" is seen with --enable-hardcoded-path-in-tests. */
+ if (strcmp (basename (dlfo.dlfo_link_map->l_name), "ld.so") != 0)
+ TEST_COMPARE_STRING (basename (dlfo.dlfo_link_map->l_name), LD_SO);
+ TEST_COMPARE (_dl_find_object (dlsym (handle, "environ"), &dlfo), 0);
+ TEST_COMPARE_STRING (basename (dlfo.dlfo_link_map->l_name), LIBC_SO);
+ TEST_COMPARE (_dl_find_object ((void *) 1, &dlfo), -1);
+ TEST_COMPARE (_dl_find_object ((void *) -1, &dlfo), -1);
+
/* Verify that dlmopen creates a new namespace. */
void *dlmopen_handle = xdlmopen (LM_ID_NEWLM, LIBC_SO, RTLD_NOW);
TEST_VERIFY (dlmopen_handle != handle);
base-commit: 2eddd1bf3e562e6e1b19e1f07af8ec19c0445d23
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] elf: _dl_find_object may return 1 during early startup (bug 30515)
2023-06-07 10:02 Florian Weimer
2023-06-07 17:31 ` Adhemerval Zanella Netto
@ 2023-07-06 19:44 ` Carlos O'Donell
1 sibling, 0 replies; 4+ messages in thread
From: Carlos O'Donell @ 2023-07-06 19:44 UTC (permalink / raw)
To: Florian Weimer, libc-alpha; +Cc: Adhemerval Zanella
On 6/7/23 06:02, Florian Weimer via Libc-alpha wrote:
> Success is reported with a 0 return value, and failure is -1.
> Enhance the kitchen sink test elf/tst-audit28 to cover
> _dl_find_object as well.
>
> Fixes commit 5d28a8962dcb ("elf: Add _dl_find_object function")
> and bug 30515.
Tested on x86_64 and it looks correct to me.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
>
> ---
> v2: Handle "ld.so" for --enable-hardcoded-path-in-tests.
> elf/dl-find_object.c | 2 +-
> elf/tst-auditmod28.c | 11 +++++++++++
> 2 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/elf/dl-find_object.c b/elf/dl-find_object.c
> index 928eb499cc..c1390ee10f 100644
> --- a/elf/dl-find_object.c
> +++ b/elf/dl-find_object.c
> @@ -46,7 +46,7 @@ _dl_find_object_slow (void *pc, struct dl_find_object *result)
> struct dl_find_object_internal internal;
> _dl_find_object_from_map (l, &internal);
> _dl_find_object_to_external (&internal, result);
> - return 1;
> + return 0;
OK. Normal _dl_find_object returns -1 for failure and 0 for success.
> }
>
> /* Object not found. */
> diff --git a/elf/tst-auditmod28.c b/elf/tst-auditmod28.c
> index f6ab991398..f6dfbbe202 100644
> --- a/elf/tst-auditmod28.c
> +++ b/elf/tst-auditmod28.c
> @@ -71,6 +71,17 @@ la_version (unsigned int current)
> TEST_VERIFY (dladdr1 (&_exit, &info, &extra_info, RTLD_DL_LINKMAP) != 0);
> TEST_VERIFY (extra_info == handle);
>
> + /* Check _dl_find_object. */
> + struct dl_find_object dlfo;
> + TEST_COMPARE (_dl_find_object (__builtin_return_address (0), &dlfo), 0);
> + /* "ld.so" is seen with --enable-hardcoded-path-in-tests. */
> + if (strcmp (basename (dlfo.dlfo_link_map->l_name), "ld.so") != 0)
> + TEST_COMPARE_STRING (basename (dlfo.dlfo_link_map->l_name), LD_SO);
OK.
> + TEST_COMPARE (_dl_find_object (dlsym (handle, "environ"), &dlfo), 0);
OK.
> + TEST_COMPARE_STRING (basename (dlfo.dlfo_link_map->l_name), LIBC_SO);
> + TEST_COMPARE (_dl_find_object ((void *) 1, &dlfo), -1);
> + TEST_COMPARE (_dl_find_object ((void *) -1, &dlfo), -1);
OK.
> +
> /* Verify that dlmopen creates a new namespace. */
> void *dlmopen_handle = xdlmopen (LM_ID_NEWLM, LIBC_SO, RTLD_NOW);
> TEST_VERIFY (dlmopen_handle != handle);
>
> base-commit: 85e6d8b4175fcb195011a0a1bad37d6f3b2355db
>
--
Cheers,
Carlos.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v2] elf: _dl_find_object may return 1 during early startup (bug 30515)
2023-06-07 10:02 Florian Weimer
@ 2023-06-07 17:31 ` Adhemerval Zanella Netto
2023-07-06 19:44 ` Carlos O'Donell
1 sibling, 0 replies; 4+ messages in thread
From: Adhemerval Zanella Netto @ 2023-06-07 17:31 UTC (permalink / raw)
To: Florian Weimer, libc-alpha
On 07/06/23 07:02, Florian Weimer wrote:
> Success is reported with a 0 return value, and failure is -1.
> Enhance the kitchen sink test elf/tst-audit28 to cover
> _dl_find_object as well.
>
> Fixes commit 5d28a8962dcb ("elf: Add _dl_find_object function")
> and bug 30515.
>
LGTM, thanks.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
> v2: Handle "ld.so" for --enable-hardcoded-path-in-tests.
> elf/dl-find_object.c | 2 +-
> elf/tst-auditmod28.c | 11 +++++++++++
> 2 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/elf/dl-find_object.c b/elf/dl-find_object.c
> index 928eb499cc..c1390ee10f 100644
> --- a/elf/dl-find_object.c
> +++ b/elf/dl-find_object.c
> @@ -46,7 +46,7 @@ _dl_find_object_slow (void *pc, struct dl_find_object *result)
> struct dl_find_object_internal internal;
> _dl_find_object_from_map (l, &internal);
> _dl_find_object_to_external (&internal, result);
> - return 1;
> + return 0;
> }
>
> /* Object not found. */
> diff --git a/elf/tst-auditmod28.c b/elf/tst-auditmod28.c
> index f6ab991398..f6dfbbe202 100644
> --- a/elf/tst-auditmod28.c
> +++ b/elf/tst-auditmod28.c
> @@ -71,6 +71,17 @@ la_version (unsigned int current)
> TEST_VERIFY (dladdr1 (&_exit, &info, &extra_info, RTLD_DL_LINKMAP) != 0);
> TEST_VERIFY (extra_info == handle);
>
> + /* Check _dl_find_object. */
> + struct dl_find_object dlfo;
> + TEST_COMPARE (_dl_find_object (__builtin_return_address (0), &dlfo), 0);
> + /* "ld.so" is seen with --enable-hardcoded-path-in-tests. */
> + if (strcmp (basename (dlfo.dlfo_link_map->l_name), "ld.so") != 0)
> + TEST_COMPARE_STRING (basename (dlfo.dlfo_link_map->l_name), LD_SO);
> + TEST_COMPARE (_dl_find_object (dlsym (handle, "environ"), &dlfo), 0);
> + TEST_COMPARE_STRING (basename (dlfo.dlfo_link_map->l_name), LIBC_SO);
> + TEST_COMPARE (_dl_find_object ((void *) 1, &dlfo), -1);
> + TEST_COMPARE (_dl_find_object ((void *) -1, &dlfo), -1);
> +
> /* Verify that dlmopen creates a new namespace. */
> void *dlmopen_handle = xdlmopen (LM_ID_NEWLM, LIBC_SO, RTLD_NOW);
> TEST_VERIFY (dlmopen_handle != handle);
>
> base-commit: 85e6d8b4175fcb195011a0a1bad37d6f3b2355db
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH v2] elf: _dl_find_object may return 1 during early startup (bug 30515)
@ 2023-06-07 10:02 Florian Weimer
2023-06-07 17:31 ` Adhemerval Zanella Netto
2023-07-06 19:44 ` Carlos O'Donell
0 siblings, 2 replies; 4+ messages in thread
From: Florian Weimer @ 2023-06-07 10:02 UTC (permalink / raw)
To: libc-alpha; +Cc: Adhemerval Zanella
Success is reported with a 0 return value, and failure is -1.
Enhance the kitchen sink test elf/tst-audit28 to cover
_dl_find_object as well.
Fixes commit 5d28a8962dcb ("elf: Add _dl_find_object function")
and bug 30515.
---
v2: Handle "ld.so" for --enable-hardcoded-path-in-tests.
elf/dl-find_object.c | 2 +-
elf/tst-auditmod28.c | 11 +++++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/elf/dl-find_object.c b/elf/dl-find_object.c
index 928eb499cc..c1390ee10f 100644
--- a/elf/dl-find_object.c
+++ b/elf/dl-find_object.c
@@ -46,7 +46,7 @@ _dl_find_object_slow (void *pc, struct dl_find_object *result)
struct dl_find_object_internal internal;
_dl_find_object_from_map (l, &internal);
_dl_find_object_to_external (&internal, result);
- return 1;
+ return 0;
}
/* Object not found. */
diff --git a/elf/tst-auditmod28.c b/elf/tst-auditmod28.c
index f6ab991398..f6dfbbe202 100644
--- a/elf/tst-auditmod28.c
+++ b/elf/tst-auditmod28.c
@@ -71,6 +71,17 @@ la_version (unsigned int current)
TEST_VERIFY (dladdr1 (&_exit, &info, &extra_info, RTLD_DL_LINKMAP) != 0);
TEST_VERIFY (extra_info == handle);
+ /* Check _dl_find_object. */
+ struct dl_find_object dlfo;
+ TEST_COMPARE (_dl_find_object (__builtin_return_address (0), &dlfo), 0);
+ /* "ld.so" is seen with --enable-hardcoded-path-in-tests. */
+ if (strcmp (basename (dlfo.dlfo_link_map->l_name), "ld.so") != 0)
+ TEST_COMPARE_STRING (basename (dlfo.dlfo_link_map->l_name), LD_SO);
+ TEST_COMPARE (_dl_find_object (dlsym (handle, "environ"), &dlfo), 0);
+ TEST_COMPARE_STRING (basename (dlfo.dlfo_link_map->l_name), LIBC_SO);
+ TEST_COMPARE (_dl_find_object ((void *) 1, &dlfo), -1);
+ TEST_COMPARE (_dl_find_object ((void *) -1, &dlfo), -1);
+
/* Verify that dlmopen creates a new namespace. */
void *dlmopen_handle = xdlmopen (LM_ID_NEWLM, LIBC_SO, RTLD_NOW);
TEST_VERIFY (dlmopen_handle != handle);
base-commit: 85e6d8b4175fcb195011a0a1bad37d6f3b2355db
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